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SHEET METAL GORRUGATING ROLL.

No. 329,322. Patented Oct. 27, 1885.

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J. L. LEWIS. SHEET METAL OORRUGATING ROLL.

No. 329,322. Patented Oct. 27, 1885.

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JOHN L. LEWVIS, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE LEWIS FOUNDRY 'AND MACHINE COMPANY, (LIMITED,) OF SAME PLACE.

SHEET-METAL-CORRUGATING ROLL.

SPECIFICATION forming part of Letters Patent No. 329,322, dated October 27,1885.

Application filed August 4, 1885. Serial No. 173,540. (No model.)

To all whom it may concern:

Be it known that I, JOHN L. LEWIS, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Sheet-Metal- Corrugating Rolls; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it ap pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

Machines for corrugating sheet metal are composed, essentially, of two longitudinally fluted or grooved rolls, the grooves being alike in both and symmetrical, the rolls beingjournaled in ordinary housings, and each roll driven by positive gearing. The common mode of gearing is to fit the roll-neck (outside the housing) with a worm-gear and drive it by means of a worm on a vertical shaft; but whether the gearing be of the Worm form or ordinary spur-gearing be used, the following difficulty arises in use: When it becomes necessary to raise the upper roll to accommodate thicker sheet metal, the act of raising the bearings and roll partially rotates the roll itself, since its gear-wheel is engaged with the worm, which acts as a stop and pivotal point. The result is that the partial rotation thus necessarily given the upper roll entirely disarranges the symmetrical relation between the ridges on one roll and the grooves on the other; but for the proper operation of corrugating-rolls these ridges and grooves must be always maintained in one definite relationnamely, with an equal space at all points and positions. The slightest disturbance of this relation causes the ridge on one roll to approach the adjoining ridge on the other roll, thereby tending to grind the metal passing between them. My object is to prevent this result; and therefore my present invention consists in the novel construction and. arrangement of the rolls and gearing, whereby the tendency of the upper roll to revolve forwardly or backwardly by the raising ofthe same will be offset by a corresponding change in the relation of the driving-gear.

Referring to the accompanying drawings, illustrating my improvement, Figure 1 is an end elevation of the rolls with gearing re quired, and Fig. 2 a sectional view of worm and worm-shaft; Fig. 3, an elevation of the rolls and gearing; Fig. 4, a sectional view of a detail.

A is the lower or fixed corrugating-roll, and B is the upper or adjustable corrugating-roll. Both are adapted to be positively driven by means of the worm-gear.

The drawings show the gearing for driving the upper roll, B, on the right-hand side of Fig. 1, that for driving the lower r011 being at the opposite end, as shown in Fig. 3, and both receiving motion from the horizontal shaft 0 and suitable miter or beveled gears. The worm-wheel D, keyed on the neck of roll B, meshes with the worm E, which is bored out to fit on vertical shaft f, the latter having a spline, g, and theworm E having the lon- 7o gitudinal groove h in its inner face. Thus the worm E can be moved up and down the shaftf, but cannot turn thereon. Shaftf is threaded for a suitable distance at each end of the normal position of worm E, and fitted 7 5 with the nuts 13 and the jam-nuts i. The shaft f is suitably j ournaled and geared to the driving-power. Now, when an upward adjustment of roll B becomes necessary to accommodate thicker sheet metal, by loosening the nuts z i the worm E may be raised in exact coincidence with the roll B, or vice versa when roll B is to be lowered, after which the nuts 2' t" are tightened again, and the roll B will not have lost its symmetrical relation with the roll A. Obviously, the two rolls A and B can be driven by a single vertical shaft at one end having two worms, one righthanded and the other left-handed, and the upper worm arranged as I have described.

\Vhat I claim, and desire to secure by Letters Patent, is

1. In a corrugatingmachine composed of two corrugating-rolls, one of which is adj ustable to or from the other, and both posi- 5 tively driven, the combination, with the ad justable roll, of driving-gear adapted to be correspondingly adjusted in the same direc tion, substantially as described, whereby the symmetrical relations of the two rolls are pre- 10o served.

2. In a corrugating-machine composed of the roll A and the adj ustable 1-011 13, the commy own I have hereto affixed my signature in bination, with said r011 13, of the worm-Wheel D, the grooved worm- E, vertical drivingshaft f, having spline g, and threaded as de- 5 scribed, nuts 4;, and jam-nuts i, substantially as described.

In testimony that I claim the foregoing as presence of two witnesses.

JOHN L. LEWIS.

Witnesses:

T. J. MOTIGEE; GEO. ALEXANDER. 

